![]() I followed it with a live demonstration, using TeamViewer to connect with my iPad from the club’s meeting location to my Windows PC at home which was controlling my HF radio. Although they aren’t designed for “rag chewing,” or extended conversations, they do fill a gap for “DX chasers”–those who enjoy making brief contact with ham radio operators in other countries. JT65/JT9 are modes that shine when signals are very weak. We offer a large range of interfaces to ensure maximum compatibility with modern and older PCs and digimode software. Modes of communication that work well at low signal levels will become more prominent during the next few years as a result. Y aesu CAT control and Digital mode interfaces to use software such as Ham Radio Deluxe, FLDigi, WSJT-X to operate PSK31, FT-8, JT9, JT-65, Echolink and many other AFSK modes. Since sun spots contribute significantly to the ionization of the F1 and F2 layers of the ionosphere, worldwide propagation will wane as well. HF Digital Communicaton Mode JT65 (Es/No)JT65 (dB) (SNRreported)JT65 (dB) + (10 x LOG (2500 Hz/2.692 Hz))(dB) where: 1) 2500 Hz is the Reported SNR Noise bandwidth 2) 2.692 Hz is the actual JT65 signaling noise bandwidth also known as the JT65 FSK symbol detecton bandwidth (Es/No)JT65 (dB) (SNRreported) JT65 (dB) + 29. ![]() Solar activity, as measured by the presence of sun spots, is expected to drop and bottom-out in 2020. I gave a short presentation to the Saint Clair Amateur Radio Club last week regarding two “relatively” new digital modes of communication on the High Frequency bands that have been gaining in popularity. This makes operation very strict and not as free as with other digital modes on HF. ![]()
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